support and retention Flashcards
resistance to vertical load directed through denture to underlying mucosa
support
what is support achieved through the use of
teeth or mucoperiosteum or both
what part of dentures provide support
saddles
connectors
what is force transmitted through
tooth to PDL to bone
dimensions of occlusal rests
1-2mm wide
1mm deep
instead of an occlusal rest, would would be put on an anterior tooth
cingulum rest
what is normally needed for a cingulum rest to help direct force vertically
a small seat in palatal or lingual aspect is cut
what can you add if you want more freedom of interocclusal space or there is significant wear on a tooth
onlays
where do overdenture abutments sit
round the tooth sitting 1mm above gingival margin
what can tooth support be gained from
occlusal/ cingulum rests
onlays
overdenture abutments
connectors
what prevents displacement by extension of the denture
indirect retention
indirect retainers
lingual plate
cummer arms
lingual bar
to reduce the effect of the displacing force where should the clasp be placed
as close as possible to saddle
indirect retainer as far as possible from saddle
what components can a saddle provide
retention
support
bracing
what components can a connector provide
support
indirect retention
bracing
